Lean Manufacturing's Influence on Agile Software Development: The Past, Present, and

Future

About Steve

• Chief Strategy Officer of Telerik• MBA from the City University of New York• Founder of Triton Works (London: UBM)• Founder of Corzen, Inc (Toronto: Wan.V)• Former CTO of Zagat Survey (GOOG)• Certified Scrum Master• Author and International conference speaker

for 14+ years

Lean History Lesson

Kiichiro ToyodaSon of Sakichi Toyoda

Taiichi Ohno

Answered the Challenge – Developed a Method Evolved Into Toyota Production System

1927: Toyoda Automatic Loom Works revolutionized the Loom – key, high precision, interchangeable parts

1945: Challenge Company to catch up to America

Core Principles of Lean Eliminate Waste Build Quality In Create Knowledge Defer Commitment Deliver Fast Respect People Optimize the Whole

The Agile Manifesto–a statement of values

Process and toolsProcess and toolsIndividuals and interactionsIndividuals and interactions

over

Following a planFollowing a planResponding to changeResponding to change over

Source: www.agilemanifesto.org

Comprehensive documentationComprehensive documentationWorking softwareWorking software over

Contract negotiationContract negotiationCustomer collaborationCustomer collaboration over

Iteration 1

Iteration 2

Iteration 3

Iteration 4

Iteration 5

Traditional Building of an Application

Database

Data Access Layer

Business Logic Layer

User Interface Layer

(whatever)

BV = 0%

BV = 0%

BV = 0%

BV = 0%

BV = 100%

0% VALUE

* Created by Stephen Bohlen http://blog.unhandled-exceptions.com Used with permission

Iteration 2 Iteration 3 Iteration 4 Iteration 5Iteration 1

Database

Data Access Layer

Business Logic Layer

UI

(whatever)

BV = 20%

Database

Data Access Layer

Business Logic Layer

UI

(whatever)

BV = 40%

Database

Data Access Layer

Business Logic Layer

UI

(whatever)

BV = 60%

Database

Data Access Layer

Business Logic Layer

UI

(whatever)

BV = 80%

Database

Data Access Layer

Business Logic Layer

UI

(whatever)

BV = 100%

60% VALUE

Agile Building of an Application

Influential Agile Methodologies• XP (The Past)• Scrum (The Present) • Kanban (The Future)

eXtreme Programming (XP)

• The first major Agile methodology• Mostly engineering focused• XP was a reaction to the traditional waterfall,

mass production way to building software– Lean principles

Scrum

• The most popular methodology today• Less engineering focused, XP solved that– Focused on process and ceremony

• Directly from Lean Manufacturing– “The New, New Product Development Thing”

Kanban• An agile methodology that stresses pulling

individual work items to completion – Focuses on visualization

• From Lean: focuses on just in time delivery of raw materials– Workers get what they need when they need it, no

sooner – Limit Work in Progress– Focus on flow

Is Lean Agile or Visa Versa?

Lean

Agile

Lean

Or

Agile

“We are seeing very little awareness of lean, and a lot of people think it is a new concept following on the coat-tails of agile. However, agile is an engineering method by which code is written, and lean is the process by which to do it, and they dovetail into each other”

- Fred George, Thoughtworks

My Predictions for Next 5 YearsLean = Framework for Agile Practices

Embrace Value Creation & Waste Reduction

Mixed Development Patterns

Lean Will Drive Success

THANKS FOR COMINGSEE YOU SOON!